388929 has 4 divisors (see below), whose sum is σ = 518576. Its totient is φ = 259284.

The previous prime is 388903. The next prime is 388931. The reversal of 388929 is 929883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 388929 - 2⁵ = 388897 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

388929 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (388529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64819 + ... + 64824.

It is an arithmetic number, because the mean of its divisors is an integer number (129644).

2³⁸⁸⁹²⁹ is an apocalyptic number.

It is an amenable number.

388929 is a deficient number, since it is larger than the sum of its proper divisors (129647).

388929 is a wasteful number, since it uses less digits than its factorization.

388929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129646.

The product of its digits is 31104, while the sum is 39.

The square root of 388929 is about 623.6417240692. The cubic root of 388929 is about 72.9944951125.

The spelling of 388929 in words is "three hundred eighty-eight thousand, nine hundred twenty-nine".